[RE-wrenches] Another solar veteran is gone
Wrenches I don’t know if any of you knew Pat McLeod, a PV installer from the San Diego area. Pat was a Navy veteran specializing in electronics. He left California and moved to New Boston Texas with his wife in 2008. He worked for me for about a year here in the North Texas area then moved to Houston. He worked for Alternative Power Solutions for several more years. Pat died Monday of stomach cancer. He left his wife Sarah, several children and a bunch of grandkids behind. A memorial service will be in Houston this Saturday. Regards… Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Diode Failure
We experienced the failure of around half of the 8 modules diodes [with clear backsheets] embedded in a SIP roof as skylights. None of the other 96 tracker mounted modules ~50-100 yards away were affected by a direct strike on the building and a nearby steel well casing. Several diodes were completely vaporized, only ashes grit in the circa 2008 J box. Spire sent replacement diodes and the system is still working today. The lightning also destroyed 5 inverters and 2 SIs inside the same building. Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Corey Shalanski Sent: Tuesday, August 05, 2014 9:03 AM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Diode Failure Wrenches, We recently were contacted by a customer who reported a lightning strike close to his house. His online monitoring revealed that 30 of 35 microinverters simultaneously stopped producing power. On initial visit to the jobsite we measured Voc on many modules - either 12V or 24V instead of rated 36V. On a second visit we discovered that bypass diodes - either 1 or 2 corresponding to observed voltage loss - had failed on each of the faulty modules. My question is: Can anyone support the theory that a nearby lightning flash can cause mass bypass diode failure? -- Corey Shalanski Joule Energy New Orleans, LA https://mailfoogae.appspot.com/t?sender=aY3NoYWxhbnNraUBqb3VsZS1lbmVyZ3kuY29ttype=zerocontentguid=e8f1bdf1-384f-4952-a79b-87bd13d91385 ᐧ ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] high efficiency modules in U.S.
Photon magazine and numerous other publications have pointed out one of the most troubling results of the collapse of PV prices. That is the fact that the manufacturers have been unable to compete on anything but low price. Keep in mind that global research on PV [NREL et.al.] has not stopped just because the wholesale retail market is flat. New technology to increase cell/module efficiency and reduce production costs will become affordable and begin to return to the market only when margins begin to increase. As a result, once those profits go up manufacturers will begin to invest in these new technologies. And when there is competition based on innovation and efficiencies, not just low prices, we’ll see a return to the market of years ago before PV just became little more than a low-priced commodity. PV is like natural gas, it’s underpriced because there is a glut of it on the market. A higher price for PV will also put more pressure on the SunShot initiative to drive BOS and soft costs lower. Inverter costs could go a whole lot lower. Those manufacturers are not struggling like PV is struggling. The collapse of PV industry cut waste, got rid of weak companies and made the industry really work to survive. This is what needs to happen to the fat and profitable inverter industry. I don’t know how to bring that about but you can imagine how installed costs would benefit if inverter prices dropped 50% and PV prices rose 10%. My 2¢ Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Korthof Sent: Friday, April 25, 2014 10:14 AM To: RE-wrenches Subject: Re: [RE-wrenches] high efficiency modules in U.S. These anti-solar tariffs are awful! What a horrible disappointment--- they won't revive a dead horse (domestic PV manufacturing already folded), BP already closed its solar division, Evergreen/Astropower/countless others already folded, they won't protect Solar World (which isn't even a US company) but they will hurt consumers: -drive solar businesses out of the marketplace and out of business -less competition and fewer options in the market = lower quality and higher prices -lack of product -lack of replacement product -aftermarket warranty support for solar will evaporate /wk William Korthof 714.875.3576 Sustainable Solutions #956904 On Apr 25, 2014, at 7:59 AM, Jason Szumlanski ja...@fafcosolar.com wrote: I heard Canadian Solar prices are on the rise, and supply will be tight and uncertain. Korean made panels were recommended as an alternative. Jason Szumlanski Fafco Solar https://wisestamp.appspot.com/pixview.gif?p=chromev=3.31.0t=1398437817077u=d0c775731865b324 On Fri, Apr 25, 2014 at 8:42 AM, William Dorsett wmdors...@sbcglobal..net mailto:wmdors...@sbcglobal.net wrote: I was recently told by a distributor that beginning perhaps as early as mid-May, that a number of Chinese manufacturers will stop shipping to the U.S. This is response to the solar tariffs imposed by the U.S. Does anyone know which specific manufacturers have announced discontinuing shipments and how this will tighten up the supply to U.S. installers…and thereby price? Bill Dorsett Sunwrights Manhattan, KS From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander Sent: Friday, April 25, 2014 7:05 AM To: RE-wrenches Subject: [RE-wrenches] high efficiency modules in U.S. Now that it appears Sanyo/Panasonic is no longer available, and Sunpower distribution is tightly controlled, what other high-efficiency alternatives are U.S.-available? Thanks. Kirk Herander VT Solar, LLC Un-Common quality since 1991 www.vermontsolarnow.com dba Vermont Solar Engineering NABCEPTM Inaugural Certificant VT RE Incentive Program Partner 802.863.1202 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches..org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette:
Re: [RE-wrenches] 1000V System Wiring Details
Your typical scaffolding walkboard is rated at 75 lb/ft². Jim Duncan -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Wednesday, March 26, 2014 11:15 PM To: RE-wrenches Subject: Re: [RE-wrenches] 1000V System Wiring Details August: What about the expense of servicing and/or replacing roof mounted inverters? There is a very finite limit on the weight that is practical/legal to haul up a ladder. Sure it's easy to toss an inverter on the roof at the install when there is already a lift in the budget to hoist the PV. Later on your crew might be tempted to slide a replacement inverter up the ladder, but this is not always safe or OSHA legal. It's at least $400 to bring a scissors lift and a reach lift is about $600. Is this really good economics / safety practice? William Miller Solar On Mar 26, 2014, at 7:31 PM, August Goers aug...@luminalt.com wrote: . Going forward, we are going to strive to put inverters on the roof to minimize the expense of dealing with the 1000 V runs. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Autocad
A correction to my earlier reply: AutoCad will 'print' directly to a pdf file on newer versions using MS Windows7 8. Adobe no longer supports that function on earlier versions of Acad. Mine is a full commercial version of 2000i and works flawlessly today. In the 80s 90s text other instructional books came with all software. Find old copies, often 100s of pages of commands examples. Acad doesn't ever change commands, just adds new ones so even a decade old book is accurate. Find a local chapter of an AutoCad Users Group to meet others with decades of knowledge. Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Brooks Sent: Wednesday, March 12, 2014 6:34 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Autocad William, Go to http://www.associatedsoftwaresales.com/home.php . They do a 48-month lease of 2013 AutoCAD LT for $325. If you really need AutoCAD, there is no cheaper route that I know of. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Wednesday, March 12, 2014 4:09 PM To: RE-wrenches Subject: [RE-wrenches] Autocad Friends: The 3D CAD software I have been using is obsolete. I have decided to upgrade to Autocad. I am temporarily using an educational copy while I learn, but I need to purchase a copy. Before I go out and plunk down $4k, I need to do some research: Do I have to expect to pay that much? Where is a good place to purchase? Are there copies of one generation old programs available? I am a self teacher but I use printed texts. What is your favorite Autocad reference? Thanks everyone! William Gradient Cap_mini Lic 773985 millersolar.com (hyperlink) 805-438-5600 _ http://www.avast.com/ This email is free from viruses and malware because avast! Antivirus http://www.avast.com/ protection is active. image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Autocad
The only difference in AutoCad and the Lt version is the lack of 3D capability. Autocad also will save directly as a pdf file as long as you are not using any Microsoft OS newer than XP. It's not difficult to learn since you will only be using a dozen or two of the thousands of commands for 99% of your work. It's also one of the most stable programs I have ever used [since 2000]. Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Wednesday, March 12, 2014 9:57 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Autocad August, Wrenches: I cannot operate without a true 3D cad program. I cannot operate in the environment I am in using third party software. I really like the idea of leasing. I would out $525 for 4 years of AutoCAD, about the same for owning a lesser program. Granted, AutoCAD has a steep learning curve, but that never stopped me from trying anything in life. I will continue to use Visio for many tasks. Nothing creates a better block diagram more easily or more attractively. Thanks everyone for the input. William From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers Sent: Wednesday, March 12, 2014 7:38 PM To: RE-wrenches Subject: Re: [RE-wrenches] Autocad Hi William, We use AutoCAD and AutoCAD LT in our office. Although Sketchup is pretty awesome for the reasons others have already mentioned, it really doesn't compare to AutoCAD for heavy duty design drawings - especially single line electrical drawings. We're about 50%+ commercial at this point so we need to interface with architects and other trades so need AutoCAD. That said, AutoCAD LT is probably sufficient for you unless you want to do 3D and it costs about $1,200. You can download it right from the Autodesk website. I like Bill Brooks' idea of leasing it too! I haven't tried TurboCAD but I've heard that there can be compatibility issues between it and AutoCAD if you're sharing files back and forth. It is quite a bit cheaper. We used to use MS Visio and it took about a year to get up to speed with AutoCAD. But once you get used to all the shortcuts in AutoCAD is is quite fast. Best, August Luminalt August Goers Principal Luminalt Energy Corporation o: 415.641.4000 m: 415.559.1525 www.luminalt.com On Wed, Mar 12, 2014 at 6:46 PM, Exeltech exelt...@yahoo.com wrote: For line drawings and other 2D illustrations, Libre CAD reads and writes DXF files. There are versions for Windows, Apple OSX, and Linux. It's also F-R-E-E. Simply download and install. http://librecad.org/cms/home.html Dan On Wed, 3/12/14, Bill Hoffer suneng...@gmail.com wrote: Subject: Re: [RE-wrenches] Autocad To: RE-wrenches re-wrenches@lists.re-wrenches.org Date: Wednesday, March 12, 2014, 7:43 PM William I second using Sketchup and Layout for $500 . I have seen the add on Roof Pro Plug in and Skelion ( $199) demo that lays out the array and links to PVwatts for power analysis. Plus Combined with google earth , does great shading analysis I. I think you can do a quick design in an hour and Autocad would be days! Stay away from Autocad unless you really need it for large commercial jobs and like Jason said it is required to interact with other trades! Plus Solar Energy Engineering is starting a web based training for using it for solar projects. It really is pretty cool and a lot more flexible than overpriced and overly complicated Autocad. Autocad light woudl be my first choice, no way you need the full blown version. Bill ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] PV Assist - customer management
Funny reminds me of the old days, I seem to recall a lot of years back, on this same discussion site, a similar exchange. It seems that one installer was looking for advice concerning an overly demanding customer with unreasonable expectations for a PV systems performance. The customer was the Dept. of Defense. Opposing points-of-view questioned why any Wrench in their right mind would waste perfectly good, and expensive, PV on someone whose goal was world domination and death to all who opposed them. I'll sell 'em PV because I'm in the business of selling PV was the response. Other debates have sprung from Wrenches complaining that potential customers have two SUVs parked in front of a 6500 sf home. These people clearly don't get it! Why should I waste PV on them? The answer is always the same. Because it's what we do. McMansion owners and the DOD are now believers and established customers. Now there is no one that wouldn't agree that the growing exodus from our decaying, congested and polluted urban metromess will not continue to increase. It's no different now than years ago. Sell them all the PV they are willing to pay for but do it with unabashed honesty. And when they are neck deep in challenges from their lifestyle decision, they will always remember that you warned them that it would be like this. And they will respect you for it if they have an ounce of integrity. This new generation of get-out-of-town with their all-electric lifestyle may be our next market segment to deal with. If you don't want their business then some other PV installer will. If the job's done right the first time it benefits us all. If not we all take one step back. Our industry competition includes the coal, natural gas and electric utility cartel. They and a lot of politicians, stand shoulder to shoulder in opposition to individuals generating their own power. You had better take every customer you can get and make a believer out of them because the competition is doing everything they can to put up hurdles to PV growth. And because ours is one of those industries that trains-your-competition it's important that we train them to high standards. It's not easy being a pioneer. Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Hilton Dier III Sent: Saturday, August 17, 2013 9:13 AM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] PV Assist - customer management This: PS: the good customers are not necessarily the greenest people, they are the ones that reduce consumption as best they can, do their homework, trust me and pay on time. I'd add, and have a grasp on the realities of the situation. There are people who will never grasp that you can't consistently leave a battery at 90% DOD for a week without shortening its life. Or that solar irradiance drops in the winter. You can recite the facts to them and they will nod and look like they are absorbing information, but memory fades and a month later they will complain about the exact thing you explained to them. William, whatever you do with these clients, I recommend that you write a short disclaimer about battery life and have them read it and sign it. I acknowledge that this particular design and implementation is not ideal for long battery life. I do not expect the battery banks as installed and used to last their advertised cycle life. Or something like that. When they ask why you aren't designing it differently, quote them the price for a system that would preserve the batteries. Pick their jaw up off the ground for them, hand it back, and make them sign. At the very least it will put them on notice that the reality of the situation is not ideal. Good luck. Hilton -- Hilton Dier III Renewable Energy Design Partner, Solar Gain LLC 453 East Hill Rd. Middlesex, VT 05602 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SnapNrack
The only complaint with the Snapnrack rails is the thin wall can easily be distorted. This will allow the nut to drop out of its groove. Love the universal end clamps but have learned to assemble every one to check for proper fit before getting on the roof. Jim Duncan -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Friday, May 31, 2013 7:32 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] SnapNrack Hello Wrenches, How would you rate the SnapNrack mounting systems against Unirac and other mounting systems? Thanks, Drake ___ List sponsored by Home Power magazine List Address: mailto:RE-wrenches@lists.re-wrenches.org RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Wasps
Maybe stuns was a poor choice of words. Mellows might be better. Still works on bees but the point was that it might have the same mellowing effect on wasps. http://en.wikipedia.org/wiki/Bee_smoker Jim From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob-O Schultze Sent: Monday, May 06, 2013 11:22 PM To: RE-wrenches Subject: Re: [RE-wrenches] Wasps Jim, Sorry, but that's really bad advice. Smoke doesn't stun bees. It makes them think there is a fire and they begin to gorge themselves with honey in preparation for fleeing. While they are doing that, they mostly ignore you. Might work that way with wasps, but I don't know that for sure and I'm betting you don't either. Most wasps don't collect nectar to evaporate into honey, they eat meat in the form of other insects. Ya might just piss them off. Bob-O On May 6, 2013, at 8:04 PM, Solarguy wrote: I don't know if smoke stuns wasps like it does bees. That could be a humane way to distract them while you get the nest off the module so maybe they will go somewhere else. Jim From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dana Brandt Sent: Monday, May 06, 2013 3:32 PM To: RE-wrenches Subject: Re: [RE-wrenches] Wasps Thanks for the input everyone. She's pretty set on getting rid of them. I'll recommend hosing them down with water at night. I think she's going to want to go chemical, though. I'd love to hear anyone's experience with sprays damaging the backsheet or not. Thanks, Dana Dana Brandt Ecotech Energy Systems, LLC www.ecotechenergy.com http://www.ecotechenergy.com/ d...@ecotechenergy.com 360.318.7646 On Thu, May 2, 2013 at 11:13 AM, Dana Brandt d...@ecotechenergy.com wrote: Hi Wrenches, I have a client who has developed quite a problem with wasps behind her array. Does anyone have experience getting rid of them? I'm afraid of the possibility of sprays damaging the backsheet. Is that a legitimate concern? Thanks, Dana Dana Brandt Ecotech Energy Systems, LLC www.ecotechenergy.com http://www.ecotechenergy.com/ d...@ecotechenergy.com 360.318.7646 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org http://www.members.re-wrenches.org/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] isofoton 150/S/24
Those were manufactured only for a short time and just before Isofoton retreated from the US market about 2006 I recall. I have two spares but they are for my own personal 2.7 kW trackers. Do the ones needing replacement have the micro-textured glass? Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 NABCEP Logo From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of toddc...@finestplanet.com Sent: Thursday, May 02, 2013 2:49 PM To: RE-wrenches Subject: [RE-wrenches] isofoton 150/S/24 wrenches, i have a customer who is wanting to add more modules to an existing array. he currently has isofoton 150/S/24s which are 41.25 X 48.25. does anyone have any possibilities on where to find 6 of these? thanks, todd Sent from Finest Planet WebMail. image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Stainless Steel Cable Ties
I get mine locally from Allied Electronics. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chris Mason Sent: Thursday, April 25, 2013 10:12 AM To: RE-wrenches Subject: Re: [RE-wrenches] Stainless Steel Cable Ties Where do you get them and who makes them? On Thu, Apr 25, 2013 at 10:07 AM, Solarguy nt...@1scom.net wrote: We have used 8 flat SS ties for years and I have no concern about the wear on the conductor insulation. They are long enough to circle a standard Unirac rail and several wires leaving 1 or so tag end. Needle nose pliers work to twist the end and snug down the tie as tight as you're comfortable with. The metal tie, once bent around the corners cannot stretch any tighter, unlike nylon, regardless of how tightly you twist the pliers. As for the edges, quality ties are not sharp. Or cheap. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 NABCEP Logo From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Szumlanski Sent: Thursday, April 25, 2013 8:08 AM To: RE-wrenches Subject: Re: [RE-wrenches] Stainless Steel Cable Ties There was a recent thread about wire management. Heyco SunBundler ties have a vinyl coating. I recommended the clips from PV Racking that are stainless steel coated in rubber. I've had the same concern, and both of these seem like good solutions to me. Jason Szumlanski Fafco Solar On Thu, Apr 25, 2013 at 1:20 AM, Benn Kilburn - DayStar Renewable Energy b...@daystarsolar.ca wrote: Wrenches, I searched the archives, but came up with nothing on this.. I have found a good supplier for reasonably priced stainless steel cable ties and have been using them in place of black nylon cable ties for supporting cables, PV wires and micro-inverter wires to the mounting rails and such. I feel better knowing the wires under the array are supported this way rather than with plastic/nylon cable ties, for which I tried but cannot get a manufacturer to guarantee will last 20+yrs. A colleague is questioning this method (SS ties) with the concern that over time the (albeit small) movement in the wires and/or expansion/contraction of the rails could result in the stainless steel cable ties cutting thru the wire's insulation and then... I have heard this concern before from others as well. The way I see it is that the very popular stainless steel S cable clips that hold wires to module frames have comparable equal sharp edges as well and would pose the same risk, but there doesn't seem to be any concern there. I am wondering who else is using SS ties in place of nylon ones, and if you are taking additional steps to protect the wire's insulation from the SS ties? Common sense abides, meaning don't wrap a wire around the SS ties so that the wire has tension on the sharp edge of the tie. Flat edge contact with the wire only, the same way that you wouldn't run a wire across/around a sharp cut edge of a rail or anything else. Thanks, benn ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Fwd: Content-Type: text/plain;
Is this a virus A lot of them going around sent from unaware friends -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Gary Easton Sent: Friday, March 22, 2013 11:57 AM To: RE-wrenches Subject: [RE-wrenches] Fwd: Content-Type: text/plain; http://daycoms.com/dvmmaa.php?s=ma1 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] 1000 Vdc
What certifications do they have? Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chris Mason Sent: Friday, March 29, 2013 4:53 PM To: RE-wrenches Subject: Re: [RE-wrenches] 1000 Vdc I just had to deal with this problem. I bought 1000V wire and 1000V SolarBos fused combiners with disconnects from AEESolar. BUt I found the SolarBos to be huge and have sourced compact fused combiners with disconnects from the UK. They are not UL listed but I don't care. On Fri, Mar 29, 2013 at 3:08 PM, Nathan Stumpff nat...@arcticsun-llc.com wrote: Wrenches, This is an offshoot in a way to the Cable Tray discussion, but until there are Brits running my permit office. I am considering pitching a 1,000 Vdc system to my AHJ, and it seems like the solar components (modules, inverters, combiners, array wire) are the easy part in a lot of ways. We use Cerro XHHW-2 for basically all of our wiring outside of an array, and it is clearly marked 600 V. Does anyone have a good resource for wire, conduit, fittings, junction boxes, etc. that carries a 1000 Vdc rating? Does anyone know of a 1,000 Vdc rated PV Wire that can be run in conduit in a building? Any info appreciated, thanks, -Nathan -- Nathan J. Stumpff NABCEP Certified PV Installer #091209-175 NABCEP Certified Solar Heating Installer #032412-14 Project Manager | Arctic Sun, LLC nat...@arcticsun-llc.com mailto:nat...@arcticsun-llc.com | (907) 457-1297 tel:%28907%29%20457-1297 www.reina-llc.com | www.arcticsun-llc.com http://www.arcticsun-llc.com/ http://www.facebook.com/ArcticSunLLC http://www.facebook.com/ArcticSunLLC http://www.facebook.com/ArcticSunLLC ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org http://www.facebook.com/ArcticSunLLC http://www.facebook.com/ArcticSunLLC http://www.facebook.com/ArcticSunLLC -- Chris Mason http://www.facebook.com/ArcticSunLLC President, Comet Systems Ltd http://www.facebook.com/ArcticSunLLC www.cometenergysystems.com http://www.facebook.com/ArcticSunLLC Cell: 264.235.5670 http://www.facebook.com/ArcticSunLLC Skype: netconcepts ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Metal shingles
Be sure to check with the roofs installer first. I have had to pay roofers to send a crew out to 'drill holes' to avoid the homeowner losing their warranty on the shingles. Especially if it's a specialty type of roof you don't want to be blamed for leaks or warranty cancellation. Been there done that.. Jim Duncan -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jesse Dahl Sent: Wednesday, March 20, 2013 10:33 PM To: Wrenches Subject: [RE-wrenches] Metal shingles Hello, I looked at a site today and the roofing was a brand of metal shingle. This was just a quick drive by and check out the site so I don't have access to the brand or method of attachment. It still got me thinking, what are people doing for attachments to roofing like this? 6/12 pitch, and from the photos the client sent me, the structure is 2X6 truss running N-S, with 1x4 strapping every 4' running E-W along with 5/8 OSB on top of the strapping. The trusses look to be on 4' centers (just judging by the photo). The only thing I can think of is EJOT type fasteners through the shingle into the truss. The shingles would crush a little bit, but the OSB would support it pretty well. Otherwise removing the shingles where the feet would go and then. As always thanks for all the help. Jesse Sent from my iPhone ___ List sponsored by Home Power magazine List Address: mailto:RE-wrenches@lists.re-wrenches.org RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solar-direct pool pumping
SunRotor has a surface pool pump with controller, with a five year warranty. That's longer than some others I have looked at. I've been a dealer a little over a year and no complaints except one sub well pump with a helical rotor that keeps getting loaded with sand falling into the casing. http://www.sunrotor.com/ Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 NABCEP Logo From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Korthof Sent: Wednesday, February 20, 2013 11:03 AM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Solar-direct pool pumping A few questions. I have a customer who really wants a solar-direct pool pump for his home. Medium size in-ground pool and I'd like the pump to be strong enough to lift to the solar pool panels (12 ft lift above pool level). I'd like to offer him hardware that is at least one notch above experimental beta-test. I remember the SunCentric from several years ago, but not sure how durable that turned out, and I was having trouble a vendor for it now. Any suggestions for today with some favorable track record? Or suggestions on what to avoid? William Korthof Sustainable Solutions Partners image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Redundant Bonding
Could you maybe add some details to the photo and download it to the Wrenches ftp site? Then we can all view it there. I don't recall the process though Michael once posted the steps. The site is a great place for info just like this. M also screens everything before it gets posted. ftp://ftp.re-wrenches.org/pub/ Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 NABCEP Logo From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers Sent: Wednesday, February 20, 2013 2:34 PM To: RE-wrenches Subject: Re: [RE-wrenches] Redundant Bonding Hi Karl - I'll send you a picture off list showing how we typically wire up 7-terminal meter sockets. In the Milbank meter sockets we typically use the neutral bar is factory bonded to the can. So, we pass the neutral through the can and then connect a ground in the can. This provides the power necessary to run the meter without bonding the neutral to ground in two locations. I'm not sure that I'm following your issue relating to the inverter and NEC 250.142(B). The Power One 10k unit has HF isolation and still needs a DC GEC as far as I know. Best, August 415.559.1525 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Karl Jaeger Sent: Wednesday, February 20, 2013 8:13 AM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Redundant Bonding Greetings Wrenches, I am having issues with the electrical plans reviewer approving our drawing package. The system consists of a PVI 10.0, 3-phase inverter to be interconnected via backfed breaker to a 120/208 service. We have a feed in tariff program which requires a solar generation meter base. The solar meter base is provided by the utility, it is 7-terminal therefore it has a neutral connection and a bond between neutral and ground. The service is also bonded, of course. We have two bonds resulting in a ground loop. The utility refuses to allow us to remove the bonding jumper in the solar meter base and we can't float the neutral thru because the meter must see a neutral to spin. The inverter has an isolated transformer which I believe steers us around 250.142 (B). However, Power One does not specify a GEC termination point in their inverter so the reviewer is reluctant to accept this solution. Has anyone ran into this issue? Any thoughts? Thank you for your help! Karl Jaeger http://lightwavesolarelectric.com/ Description: FOR-EMAIL-SIGNATURE (Small) image001.jpgimage002.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] getting PV modules up to the roof
We started buying scaffolding in 2007 after renting it for our first 3 years. One man can lift one module 7 feet up to where one more man can grab then stack it on a solid platform 4 deep on each end of the walkboards. 8 panels stacked 8 feet off the ground in under 10 minutes. Step off the walkboard onto a 2nd story roof. Yes it's a significant investment and is bulky to transport but it makes roof access way easier, provides a place to keep tools equipment within reach and is just plain easier to climb than ladders. And safer. Not to mention it's a great assembly platform for trackers. http://www.ntrei.com/scaffold.pdf Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 NABCEP Logo From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers Sent: Thursday, February 07, 2013 12:44 PM To: RE-wrenches Subject: [RE-wrenches] getting PV modules up to the roof Hi Wrenches, I imagine that all of us working in rooftop PV have put some good hard thought on the best way to get the modules up to the roof. There are various lifts on the market, you can hoist them with ropes manually, or walk them up a ladder (sling them over your back). I find that the majority of our competition in the Bay Area walks panels up the ladder for residential projects. What is your feeling about OSHA compliance of doing this? Best, August 415.559.1525 image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Insulated cabinet source
http://www.ddbunlimited.com/ DDB Unlimited builds custom cabinets with all the bells whistles you could want. Many are for sensitive electrical equipment with ventilation fans, heat or air installed. Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 NABCEP Logo -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Sent: Friday, February 08, 2013 12:38 PM To: RE-wrenches Subject: [RE-wrenches] Insulated cabinet source Hello, I'm looking to source insulated cabinets, relatively large to house -3- Fronius 5 Kw inverters. They only have a low operating temp spec of -4F. I plan to supply min heat using a small resistive element. Long story, but inverters have to be mounted at the array and I must use Fronius. This is part of an OEM module evaluation in cold climates. Permitting does not allow building a shed. Thanks. Kirk Herander VSE ___ List sponsored by Home Power magazine List Address: mailto:RE-wrenches@lists.re-wrenches.org RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org www.members.re-wrenches.org image001.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Wire sizing calculator online
I stumbled onto this wire sizing calculator that gives NEC qualified data. Wikipedia had a link to it. http://www.cablesizer.com/ Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 NABCEP Logo image002.jpg___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Small PV system/experiment for kids
While it's a little more involved, a solar car race can provide a full half day hands-on event. It involves gear ratios and hot glue guns so will clearly take some volunteers to help out with the kids. The race afterward will get the kids outdoors in the parking lot where local vendors can get involved by supplying prizes like gift cards for pizza etc. http://www.solarmade.com/JuniorSprint.htm has some high quality kits that may require some fundraising or parental participation. We've had great success with this project over the years. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 On Wed, Dec 12, 2012 at 9:08 AM, Jason Szumlanski ja...@fafcosolar.com wrote: I have been approached by a local elementary school to develop a very small PV related experiment or system that is appropriate for children aged 9-11. Not having kids myself, I have no idea where to start with this. They are fine with mounting a PV panel on the roof, wall, or ground. They want something interesting and/or interactive that the students can monitor over time. Has anyone done something like this that would be suitable? Jason Szumlanski Fafco Solar ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Protecting/Cleaning un-connected MC Connectors
We've always used canned air for cleaning any connectors left exposed even overnight since condensation's always up before me. And since connecting them causes a metal-to-metal interference fit a layer of dust would seem to be of little consequence unless disconnected and re-connected. Moisture of some sort might cause a problem too but the tin plating should be resistant to a corrosive reaction unless its electrical in nature. But all bets are off if it's non-compatible brands [MC compatible etc] like so many modules claim to be now. And while on the topic, Photon magazines article on connector testing a year or two ago shows we do have reasons to worry. It's a shame that some of the connector manufacturers haven't come forward on this site with more information on use and misuse of their products. Does MC.com still have their downloadable installation video that offered certification training? Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of benn kilburn Sent: Friday, November 23, 2012 11:56 PM To: RE-wrenches Subject: [RE-wrenches] Protecting/Cleaning un-connected MC Connectors Wrenches, Considering the (sometimes redundant) details that some areas of module and micro-inverter install manuals describe, I have never read mention of paying attention of the condition of the (connector type) regarding moisture or dirt/dust prior to connecting. Perhaps this just gets thrown into the 'common sense' department, but considering the probability of these connectors being exposed to the elements (morning dew/rain/snow, blowing dirt/dust, bugs.) prior to being connected, and the fact that these connections will most likely be then sealed for years to come, does it not warrant pointing out that one should make efforts to protect the connectors if they are not being connected promptly after removing the modules from their shipping packaging? When we have a project and we have installed the (micro-inverters and/or modules) and did not get to making the MC connections that day and have to go back, I always make sure that any un-made connectors are protected. It used to be with whatever plastic parts bags we had on hand and some electrical tape to hold them on, then I started keeping on the truck a small roll of packing shrink wrap which works great. I wonder, am I the only one who does this, or is this a common practice amongst Wrenches? Why do I bring this up??? I was recently asked to complete an installation where modules had already been mounted to a ground mount rack, and left unconnected. I'm not sure how long they have been sitting on the rack, I didn't ask but would guess a month or three. Upon inspection I noticed that the inside of the module connectors have accumulated a distinct layer of dust and by the amount of snow we have on the ground they have surely been exposed to some level of moisture. This leaves me with some hesitations and questions. Obviously the layer of dust will inhibit the electrical connection and result in some level of resistance, so what methods are available to thoroughly clean the contact points? (think getting inside/around both the + and - connector pins). I don't think that compressed air alone would be sufficient, but perhaps compressed air and a pretty small hose brush might work? Have any of you used contact cleaner in a situation like this? Comments/suggestions.. Cheers, benn DayStar Renewable Energy Inc. www.daystarsolar.ca * Ph: 780-906-7807 Construction Electrician Solar Photovoltaic Systems Certified Certificate # 0007S HAVE A SUNNY DAY ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] AC Modules ready for primetime?
Another question to consider when it comes to ACPV warranty replacement is, do you have to send the entire module back for repair if there's a warranty claim on the inverter. Solar Bridge Exeltech both say yes. All things equal, Solar Bridge still has DC apparatus exposed but not Exeltech. It would be nice to just be able to drill out the pop rivets and unplug the SB unit return for repair. And yes, I'm kinda biased toward Exeltech but they have been building inverters for 20+ years. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Dorsett Sent: Wednesday, October 31, 2012 12:14 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] AC Modules ready for primetime? Kirk, the BenQ modules use SolarBridge inverters. One of the questions to ask with ACPV is who backs the warranty on the inverter. According to SolarBridge's website, the module manufacturer warranty's the combination. This is fine as long as the mfg stays afloat but in this time with such major players as Sharp and BP backing out, who do you turn to if your inverter has a problem? As Bill said Exeltech is in this too, and warranty's their own, so is one step less removed. One of the things we've gathered is that Enphase, with an installed base of something over a million, is having some problems with its first version, 190. Is that a problem inherent in the components chosen in its design or something as simple as insufficient potting? It is fairly low percentage, but it also hasn't been 25 years. And how does that balance with the installed base of any of the other microinverter/ACPV manufacturers? It seems that the temperature at which micros are required to live is the main advantage of remote string inverters. They can be down in the shade with free air moving around them. On the other end of that trend are the ACPV which might have very little room between them and the module backing. There might be several practical actions like mounting the modules with the inverter on the down side so the air flow is cooler (a little like putting the pump or fan on the cool input side of a thermal collector), or spacing the array higher off the roof to allow more air flow. I do agree with Bill that this is the direction the industry is heading and very quickly. Bill Dorsett Sunwrights Manhattan, KS From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Loesch Sent: Tuesday, October 30, 2012 11:43 AM To: RE-wrenches Subject: Re: [RE-wrenches] AC Modules ready for primetime? Hi Nik, As of SPI 2012, Solar Bridge advertized seven module manufacturers using their product. Remember Exeltech, manufacturer of exemplary sine wave inverters, is also a player in this ACPV market, undoubtedly other players, too. IMHO, ACPV is the route that the industry will _eventually_ follow. Bill Loesch Solar 1 - Saint Louis Solar 314 631 1094 On 30-Oct-12 10:13 AM, Nik Ponzio wrote: I have a prospective customer requesting AC modules for a commercial job. What is currently available? Thanks in advance. Nik ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5363 - Release Date: 10/30/12 No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5363 - Release Date: 10/30/12 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase and Romex
http://www.rstcenterprises.com/soladeck .Can I use a Type 3R rated SolaDeck enclosure to combine PV strings? The Type 3R SolaDeck enclosure is not listed or labeled to meet the standard for combining PV strings. There are SolaDeck models that are rated, listed, and labeled to the UL1741 standard for combining. .How is a SolaDeck Type 3R enclosure typically used? The Type 3R rated SolaDeck models are listed for outdoor use and typically are being used for simple pass through of the wire or a junction box for transition of wire. .What is best way to transition the PV wire with a SolaDeck? Wire nuts can be used but rail mounted terminal blocks are rapidly becoming the method of choice. Terminal blocks are non-fused connection devices that provide a visibly clean installation for easy labeling. * -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters Sent: Friday, October 26, 2012 3:10 PM To: RE-wrenches Subject: Re: [RE-wrenches] Enphase and Romex Thanks Benn, I've also never seen anyone switch to UF, just to wire to an exterior outlet mounted directly on an exterior wall of a home. Further, the box is usually indoor rated(if it's in the wall) and only the exterior cover plate is weather proof. Both UF and NM have THHN inside of them, and it's the THHN that is inside the exterior J box, as the weatherproof covering has been stripped off. THHN is damp rated, while THWN is wet rated. Most of that wire is actually dual rated THHN/THWN. Seems to be yet another case where solar is held to a different standard than other wiring. Ray Walters On 10/26/2012 12:02 PM, benn kilburn wrote: Glenn/Jason, So you wouldn't use romex to feed an exterior outlet on an outside wall, or to any outside lights??? ___ List sponsored by Home Power magazine List Address: mailto:RE-wrenches@lists.re-wrenches.org RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Steel roof attachments
We have had good luck with a drill tap attachment directly thru the purlins. I first researched thread pullout strength in steel on the www using 5/16-18 SS bolts. I copped a short section of standard gauge C-purlin from a local steel erection company and did my own simple pullout testing. I dont have the calculations at hand but I recall that the purlin was .090 thick which allowed almost two full threads in the steel. It was considerably more pullout strength than lags in wood. We would have used 5/16-24 bolts but fine thread is not available in SS in that small size according to our supplier. We rented the smallest magnetic-base drill press available and attached it to a heavy steel plate since the mag wouldnt stick to the sheet steel roof. The plate has to be large enough to get both feet on to hold it flat which assures that the drilled hole doesnt wallow out from the drill moving around. I also used a tap guide that assured the tap went in straight and the threads were clean. Etrna-Bond® tape on the bottom of a Snapnrac L foot attached directly to the roof after clearing metal chips with a can of compressed air. The thick sealant tape made an accurate torque value hard to verify, I ended up just going by feel rather than waiting for the click. We ended up with 2 attachments per 81 rail and 2 landscape modules per pair of rails. Im completely confident in the installation and will use it again if the need comes along. My 2¢ [after 18 years as a machinist and toolmaker] on self-tapping screws for a critical load like this is I would never consider it. The fit will be sloppy and the more oversize or out-of-round your hole the less thread engagement exists. I was disappointed that my bolt supplier could/would not bother to look for the pullout calcs for me but maybe yours will. The method I describe is labor intensive but it works if done properly. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chris Mason Sent: Sunday, October 21, 2012 8:22 AM To: RE-wrenches Subject: [RE-wrenches] Steel roof attachments I have a large steel roof project to install that is giving me some problems. There are many locations so no one is the same. Most of the roofs are steel sheet over steel purloins with no insulation. The steel sheeting is lying right on top of the purloins. Can I use a self drilling self tapping screw to attach? Who makes one large enough? In some cases I get get to the underneath but working off 30' ladders to make each attachment is too labour intensive as the warehouses are full of goods.. In the case of the roofs that have foam filled panels or corrugated I will have to use EJOT fasteners but these seem overkill for steel on steel fastening, they are very expensive. Thanks for the help, -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Utility inverter rating
Per the SI install manual: Risk of death from back‑feed into the power distribution grid in the event of grid failure. Once you set the Sunny Boy to stand‑alone grid parameters, the device no longer complies with IEEE 929 and the IEEE 1547. The out-of-the-box default for the SI is set to not backfeed if the grid goes away. The backup function causes the SI to fool the GT inverters into thinking the grid’s still around so they keep charging the battery bank even when it’s not. And the SI cannot backfeed normally. If this legal SMA workaround allows backfeeding during blackouts, a function that violates UL1741 for you or me to perform, the sentence at the top applies. My guess is that the patch allows the SI to run during a blackout and since the SI is not designed to be 1709 compliant allowing it to operate with no grid signal may pose a threat to the utility. At least that’s what I’m reading. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 On 10/18/2012 11:14 AM, Jay Peltz wrote: Hi Allan I guess I don't understand the utility concern? Are concerned for their transformers, or does it have to do with rebates? Thx Jay Peltz power On Oct 18, 2012, at 8:29 AM, Allan Sindelar al...@positiveenergysolar.com wrote: Erika, This just came up for us recently. I learned this, surprisingly, from a Customer Generation tech at our local utility. We are installing a GTWB system with two SI5048s and two SB5000s. The CG tech spoke with SMA tech support about the possibility of the SIs selling back to the utility as well as the SBs. He learned that there is a software patch that can be installed in the SIs that will allow them to do this, but that SMA will only allow the patch to be installed upon receiving written permission from the utility. This was sufficient for our utility to consider our system to be a 10kW interconnected system. This is all I know that may help you; I heard nothing about 3 seconds. You might want to explore this further with SMA tech support. Allan Allan Sindelar mailto:al...@positiveenergysolar.com al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder and Chief Technology Officer Positive Energy, Inc. 3209 Richards Lane (note new address) Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com http://www.positiveenergysolar.com/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Extensive Lightning Damage to Modules
In 2006 we installed a dozen Spire 85W modules w/clear backing in pairs as skylights. Shortly after, the building attached to the electrical equipment room, took a direct lightning strike to the wind anemometer 10 feet above the roof. Of the 12 modules four suffered damage to their diodes. Several were completely vaporized, there was nothing remaining except powder and the leads. Others had burnt diodes with leads that had clearly been very hot. Other modules were just fine, the damage seemed to be random with all 12 in series. The 4 trackers, the closest ~70 ft. away, are grounded with two spools of buried #8 bare copper and Uffer grounds in the concrete piers were untouched. Delta SS's at the tracker discos and in the inverter room were unaffected which I thought was odd. 5 Sunny boys 2 Sunny Islands in the same room were toasted. Our only experience with lightning. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff Irish Sent: Friday, September 07, 2012 9:41 AM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Extensive Lightning Damage to Modules A customer of ours has recently suffered lightning damage to 31 out of 160 top of pole mounted modules. This is the first time in 10 years that I've seen modules damaged by lightning. Lots of inverter GF fuses and a few inverters, but never modules. We're trying to determine if it was caused by the lightning flash irradiating the modules or ground currents. The array consists of 16 DPW top of pole mounts with 10 modules each, arranged in a square of 4 poles E-W and 4 rows N-S. The poles are 13 feet center to center E-W and the N-S row spacing is about 50 feet. The poles are 6 inch galvanized Technoposts, augured 5 - 7 feet into the firm ground, connected with a network of about 160 feet of bare #6 copper and at least 8 copper plated ground rods. Altogether we have about 130 square feet of bare metal surface area connected and buried in the ground at and around the array. The customer saw lightning strike just after dawn a few weeks ago a couple hundred feet to the southwest where it also destroyed two utility pole mount distribution transformers and ran along the utility wires 100 feet south of the array. The inverters are 200 feet NW and suffered no damage. The array and modules look totally fine, except some of the J-boxes are deformed from heat. Opening the J-boxes shows varying levels of damage to one or more diodes, from discoloration to being broken and cracked open. The odd thing is the pattern of damage (we've tested all the modules individually for Voc and Isc). Only modules in the south row of 4 poles are damaged, and the damage is concentrated on the modules closest to the ground; modules higher up in the air appear OK. Also, damage is less frequent as you move east, away from the direction of the strike. If it was caused by ground currents, why would the current want to go up the poles, why only the southern row of poles, and why damage more modules closer to the ground and not those at the top? Is it possible a flash near the ground irradiated the modules causing a current spike and the southern row shielded the other rows from most of the flash? Anyone have experience with this? Jeff Irish, PE President Hudson Solar 13 Hook Road Rhinebeck, NY 12572 T.845.876.3767x110 F.845.876.3912 j...@hudsonsolar.com Solar Electric Systems NYSERDA Eligible PV Installer NABCEP Certified Solar PV Installer NABCEP Certified PV Technical Sales HudsonSolar.com applewebdata://B5F2562A-2B67-4161-84E4-42F12DC28720/www.hudsonsolar.com 2011 NYSERDA Excellence in Quality Award | 2011 NYSEIA Award Winner | 2009 Best of the Hudson Valley | 2008 SunPower Dealer of the Year | EDC Business Excellence Award for Innovation ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] DC relay
Allied Electronics has a big selection of DIN mount and surface mount relays. Also a number of connectors and other solar devices. http://www.alliedelec.com/catalog/pf.aspx?fn=1145.pdf Jim Duncan Hi Wrenches, Does anyone have a recommendation for robust relay that has a 12VDC coil rated 200mA and contact rating of 20A at 48VDC? Thanks in advance. -- Mac Lewis Yo solo sé que no sé nada. -Sócrates ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Sunny Island vs. XW system - advice requested
You weren't too specific on mounting location options but does it matter that the SI is NEMA1 rated? Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 On Aug 23, 2012, at 7:39 AM, Allan Sindelar wrote: Wrenches, We have worked with Outback Radian and Schneider XW once or twice each for grid-tie with backup, and with Sunny Boy/Sunny Island numerous times. The SMA is certainly the most sophisticated equipment, but also the most expensive. For a particular job coming up, the loads are not excessive, and the array will be 8kW. The main hitch is that the array will be located on a barn roof that is about 500' from the BOS and home. I suspect that running high-voltage DC from the array to a Sunny Boy, and then feeding a pair of Sunny Islands makes the most sense. My question is this: does it make any sense to consider running two high-voltage subarrays 500' to two Schneider XW-MPPT-80 600V charge controllers, feeding two XW inverters (in order to handle the full 8kW) in a DC-coupled approach? Is there ever a situation in which this would be a better solution than SMA? Thank you, as always, Allan -- Allan Sindelar mailto:al...@positiveenergysolar.com al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder and Chief Technology Officer Positive Energy, Inc. 3209 Richards Lane (note new address) Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com http://www.positiveenergysolar.com/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] S5! question
The S-5 Kit must be adjusted with the jam nuts potentially at every clamp location to keep the modules from being forced to follow the roof contour. We have always used L-feet and rails mounted to the standard S-5 clamps since it creates a flat surface for the pv. Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Monday, August 20, 2012 9:17 AM To: RE-wrenches Subject: [RE-wrenches] S5! question Hi All, I'm doing a S5! PV kit install for the first time. Any tips, advice ? thanks, jay Peltz Power ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Metal Shingles
Corey We installed a 3.6 kW array on a very similar roof in 2006. The roof was new at that time and the roofer required us to hire his crew to put holes into the approx. 24x36 inch stamped steel panels. We used lags but no flashing. http://ntrei.com/images/Slide15.pdf is a close up of the painted sand coated steel panels. Our penetrations never leaked but earlier this year the roof began to leak in a number of places. Turns out the roofers did not follow the installation instructions properly. The customer now has traditional standing seam panels but has not managed to get a dime out of the roofer in reparation. The brand was Decra. Good luck Jim Duncan North Texas Renewable Energy Inc http://www.ntrei.com/ www.ntrei.com NABCEP PV 031310-57 TECL-27398 mailto:nt...@1scom.net nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Corey Shalanski Sent: Tuesday, August 07, 2012 7:27 PM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Metal Shingles I did a site survey today for a customer who has metal shingle roofing. The shingles are made from a thin-gauge metal and are stamped to look like cedar shakes. The homeowner was unsure about the manufacturer - they appear similar to Future Roof or EDCO ArrowLine. I am wondering about: 1) attachment solutions - flashed products (QuickMount PV) do not seem to be an option. 2) installation methods - the shingles dent easily and permanently under pressure, so we will want to contact the roof as minimally as possible. Thanks for any suggestions. -- Corey Shalanski Joule Energy New Orleans, LA ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Morningstar MPPT charge controller
Larry The Solar Boost 2512 has one big advantage in that the lighting timer control is built in. Morningstar Sunsaver MPPT requires a separate relay between the inverter controller. However the Sunsaver has almost twice the PV voltage input limit of the Solar boost. I'm relieved to hear the Sure Sine inverters high temp performance is reliable. And though no one asked, I found a battery box at http://www.ddbunlimited.com/more/outdoor-rackmount.html#pad. They are pricey but top of the line enclosures. Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher, Starlight Solar Power Systems Sent: Thursday, August 02, 2012 12:12 PM To: RE-wrenches Subject: Re: [RE-wrenches] Morningstar MPPT charge controller I built a billboard lighting system with the Suresine inverter and LED flood lights. It is the only inverter that works in the extreme summer temperatures in Yuma, AZ. The PV controller is the Blue Sky Energy SB2512iX. It has an amazing programable lighting controller built in. You will need to use the IPN-Pro remote to set up the program. The Aux. output drives a 30A SPST automotive type relay for switching the 12 volt line to the inverter. It has been working well for over two years. Larry Crutcher Starlight Solar Power Systems (928) 342-9103 www.starlightsolar.com On Aug 2, 2012, at 8:49 AM, Solarguy wrote: Wrenches The Morningstar Sure Sine inverter and MPPT charge controller sound like a good match considering the reliability of their products. But when I tried to use the CCs ability to act as a timer to turn on/off the Sure Sine via its remote on -off input terminals I found that the two are not compatible. A call to tech support and I find that I must use a third-party relay to activate the 1P-1T switch on the Sure Sine. I'm sure other Wrenches have come across this combination before for a 12V lighting system so I'm wondering what specific brand or technology of relay works reliably in a hot location. I prefer to have a DIN mounted relay but will consider something else. Thanks in advance Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org http://www.members.re-wrenches.org/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Morningstar MPPT charge controller
Wrenches The Morningstar Sure Sine inverter and MPPT charge controller sound like a good match considering the reliability of their products. But when I tried to use the CCs ability to act as a timer to turn on/off the Sure Sine via its remote on -off input terminals I found that the two are not compatible. A call to tech support and I find that I must use a third-party relay to activate the 1P-1T switch on the Sure Sine. I'm sure other Wrenches have come across this combination before for a 12V lighting system so I'm wondering what specific brand or technology of relay works reliably in a hot location. I prefer to have a DIN mounted relay but will consider something else. Thanks in advance Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] L feet no flashing in shingle roof
The text doesn’t imply that the wood will not split, it simply says it can be driven in without a pilot hole. For that matter a sheet metal screw can be driven into wood without a pilot hole. The reason that the pilot hole offers an advantage is because there will be threads cut into the entire 360° contact surface of the hole. Without a pilot, the wood will split along the grain, maybe only a tiny amount but the laws of physics make no exception because of an advertised claim. Where there is no metal to wood contact there is no holding power and the pullout strength is compromised. But that’s why the pullout charts use a 2x safety factor. Dave B. said it clearly, “I'm not sure why anyone would knowingly expose themselves to a possible construction negligence claim.”. My 2¢ 2x Jim Duncan North Texas Renewable Energy Inc www.ntrei.com http://www.ntrei.com/ NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Benn At DayStarSolar Sent: Tuesday, July 03, 2012 5:36 PM To: RE-wrenches Subject: Re: [RE-wrenches] L feet no flashing in shingle roof I haven't read up on the mentioned structural screws yet, but do they specifically state that they can be driven without a pilot hole? What is the justification and how are they different so that they won't cause a board to split under pressure? Does anyone have some good info on this? benn Sent from a 'smart' phone, with tiny keys. Please excuse shortcuts and typos. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Wind Turbines killing birds and bats
By some estimates, outdoor cats in the United States kill more than 1 million birds every day on average. Other studies suggest the death toll is as high as 1 billion per year. http://blog.nwf.org/2011/03/new-studies-highlight-impact-of-outdoor-cats-on- birds-and-other-wildlife/ Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Thursday, June 21, 2012 5:18 PM To: RE-wrenches Subject: [RE-wrenches] Wind Turbines killing birds and bats Hello Wrenches, A very knowledgeable friend has concern about wind turbines killing birds and bats, and sent me these links. From previous posts on this list and information I've heard elsewhere, I thought this really wasn't much of an issue, more of a red herring by those who are opposed to wind energy. http://www.batsandwind.org/pdf/baerwald%20et%20al%20current%20biology%202008 .pdf http://coalicionventanasverraco.org/files/horn_et_al_2008.pdf http://www.batsandwind.org/main.asp?page=research http://www.batsandwind.org/main.asp?page=researchsub=operational sub=operational http://www.sciencedaily.com/releases/2009/09/090928095347.htm http://www.abcbirds.org/abcprograms/policy/collisions/pdf/wind_rulemaking_pe tition.pdf http://en.wikipedia.org/wiki/Environmental_impact_of_wind_power How much of an issue is this really? Can we put the danger into perspective? Does this kill more bats and birds than the pollution it displaces? Thanks, Drake Drake Chamberlin ATHENS ELECTRIC LLC OH License 44810 CO license 3773 NABCEP Certified PV ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solar product whole sellers with good reputation
Back in 2003, when AEE was much smaller, they were looking for new dealers and were glad to extend credit to my new company. Other than the year or so that their online catalog was out of service, I have had no complaints of much consequences and haven't to this day. In the mean time we've used several other distributors including my all-time favorite Kyocera. I regret that they got out of the distribution side of the business, their Texas rep was a good friend as well as a good salesman. Jim Duncan North Texas renewable Energy www.ntrei.com NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 Thank you. We did try AEE a couple of years ago but they wanted to us to become a dealer/form a relationship, jumping through more hoops to order items than we wanted to go through, so we took them off our list. I can take another look at them, since we need to do something about this situation. Chris On 4/26/2012 8:33 AM, Darryl Thayer wrote: I find AEE has served me well, they went through a rough spot a few years ago, but they are solid now. I have had good reps though. I always appreacate to be able to talk to a Rep, get calls back, and honesty. Which I have found with AEE. Another is Focus Energy, they have always had good reliable service, and willing to help me with dicissions, and advice, if I ask, no hurry up and always honest. *From:* Solar Energy Solutions solarenergysoluti...@yahoo.com *To:* RE-wrenches re-wrenches@lists.re-wrenches.org *Sent:* Wednesday, April 25, 2012 4:32 PM *Subject:* Re: [RE-wrenches] Solar product whole sellers with good reputation Dear All, In 26 years of dealing with all manner of solar distributors, from solar pool heating to solar hot water to PV, I have never, ever, ever met any company anywhere or at any time that even comes close to the GREAT customer service we am getting from SunPower. Day or night we can call with design, order or Internet questions and some articulate person will be on the phone, talking to us live and answering any question we may have right there on the spot. Additionally, they are constantly providing training webinars and workshops on every facet surrounding photovoltaics. We have only carried the SunPower product for about 2 years. We love the product and we love that quality so sorely lacking everywhere else... Supercalifragilisticexpialidocious customer service. We Love SunPower! *Andrew Koyaanisqatsi* President *Solar Energy Solutions, Inc.* Since 1987, Moving Portland and Beyond to an Environmentally Sustainable Future. *503-238-4502* *www.solarenergyoregon.com http://www.solarenergyoregon.com/ * *Better one's House too little one day* *than too big all the Year after.* *From:* Carl Hansen solar...@cybermesa.com *To:* re-wrenches@lists.re-wrenches.org *Sent:* Wednesday, April 25, 2012 11:29 AM *Subject:* Re: [RE-wrenches] Solar product whole sellers with good reputation I've been using Conergy for several years and I've had very few problems. I order everything via e-mail or telephone. Carl HansenSun Elect. On 4/25/2012 8:25 AM, Jesse Dahl wrote: I use Solar Depot and AEE Solar. Solar Depot's website is tough to navigate, making orders complicated. AEE has been super easy to use, PO's work great for all my online orders, and my Rep gets back to me right away. I have had some interactions with Backwoods through a past customer and they seemed good too. Jesse Sent from my iPhone On Apr 25, 2012, at 7:25 AM, Christopher Warfelcwar...@entech-engineering.com mailto:cwar...@entech-engineering.com wrote: There is one small company in the Northeast that has been very good and that is New England Solar. They are mostly off grid, but they always get the orders right and get items to me very quickly. Chris On 4/24/2012 7:51 PM, Peter Parrish wrote: Dear William, I too had a very difficult interaction with DC-Power Systems a couple of years ago -- before they merged (whatever) with Solar Depot. Since they are now one and the same company, and it looks like the DC-Power Systems folks (and their approach to doing business) are asserting control over the combined entity, I would like to communicate with you off-line. Please feel free to contact me at peter...@pobox.com mailto:peter...@pobox.com and I will do my best to provide you with a recitation of my travails and their resolution. It might help you in your present predicament. Regards, -Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com mailto:peter.parr...@calsolareng.com Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 From: re-wrenches-boun...@lists.re-wrenches.org mailto:re-wrenches-boun...@lists.re-wrenches.org
Re: [RE-wrenches] Off-grid ground mount
Sunearth CompRail is an edge captive type railing that works great when rear access is possible. Its positive steel to steel attachment with SS bolts and threaded inserts is superior to Unirac Sunframe with its sheet metal attachment screw mount. http://sunearthinc.com Jim Duncan North Texas renewable Energy www.ntrei.com NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 _ -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Friday, March 23, 2012 2:21 AM To: RE-wrenches Subject: [RE-wrenches] Off-grid ground mount Friends: I am curious about what the rest of you are using for off-grid ground mount racks. We need a tilt angle of 45 degrees. Thanks in advance. William Miller Miller Solar Voice :805-438-5600 email: mailto:will...@millersolar.com will...@millersolar.com http://millersolar.com http://millersolar.com License No. C-10-773985 ___ List sponsored by Home Power magazine List Address: mailto:RE-wrenches@lists.re-wrenches.org RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] No underside access metal biulding attachment
I did the pullout calculations for 5/16-18 bolts last year and found that to be plenty good. After drill/tap 72 holes with a magnetic chuck drill I won't ever do it again. It's way too labor intensive. And the 24 thread pitch, which would have been stronger, was not available in stainless so we used 18TPI. Jim Duncan From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Thursday, March 15, 2012 10:17 PM To: RE-wrenches Subject: Re: [RE-wrenches] No underside access metal biulding attachment Yeah, Jay, I think Dynamic Fastener is where I saw the pull-out chart. I believe that 1/4 is equivalent to #14 - can anyone verify this? So the question (to which I don't know the answer) becomes: in heavy gauge steel (Lars mentioned about 1/8), will a 1/4 x 20 machine thread resist pullout better than a Tek thread? There would be more threads in the material with the machine thread, but the thread's major diameter is much smaller than the thread of the Tek screw. Allan Allan Sindelar mailto:al...@positiveenergysolar.com al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com http://www.positiveenergysolar.com/ On 3/15/2012 8:53 PM, jay peltz wrote: Hi Allan, I get 1/4 x 20 self taping screws from. I think they are even stronger than the TEK screws. dynamicfasterner.com Jay Peltz power ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] MC4 Box connectors
William The drill tap process you described works great for a good watertight attachment. But does Multi-Contact make the bulkhead style connectors with any thread pitch beside M12x1.5 metric ? Not that a metric tap is a big investment but the attaching using the threaded end with a nut is quicker though not water tight without sealant. Threaded is also easier to remove but the wall thickness ultimately will determine which method to use. This goes the same for wire strain relief 'glands' that come with a confusing choice of thread types- straight, tapered, metric, NPT, PG etc and with or without nuts. Many high volume distributors will send a sample part upon request allowing you to look and measure hole size, thread length and whether the neoprene insert will actually close tight on the wire you plan to put thru it. Jim Duncan North Texas renewable Energy www.ntrei.com NABCEP PV 031310-57 TECL-27398 nt...@1scom.net 817.917.0527 ** Let me know if you need anymore information or assistance. William Miller Just yesterday, working with a machinist, we figured out a simple procedure for modifying a 1/2 threaded plug to accept the threaded stud on the back of these connectors. Now we can thread these into 1/2 hubs on bell boxes. Very handy. We have only ordered them in quantities of 100. Good luck, William ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Tax Credit for New Construction?
If the homeowner runs short on tax liability to offset the 30% PV tax credit, they can extend it for up to five years. Jim Duncan On 2012/2/7 16:31, Ray Walters wrote: Hi All; I just had a customer ask if he could take the federal solar credit for his PV system on his newly built off grid home. I always thought you could, but the wording on the IRS form sounded a bit like you couldn't take it for new construction. What's the group's opinion on this? Ray Walters ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
